Brake-shoe.



W. M. SIMPSON.

BRAKE SHOE.

APPLICATION FILED APR. 26, 1912.

Patented Oct. 13, 1914.

' STATES orm I winner: at. srMrsom-"on cnroaoo, ILLINOIS, 'nssmno-nl 'ro THE RAIDWAY MATERIALS GOMBANY, OI CHICAGO, ILLINOIS, A CORPORATION ILLINOIS.

BRAKE-SHOE,

To all whom it may concern:

Be it known that I, WILLIAM M. Smrson',

a citizen of the United States, residing at the following is a specification.

This invention relates to railway brake shoes of the general type which comprises a cast metal body reinforced or strengthened by. members of wrought-iron, steel or other suitable tough material located at or adjacent to the back of the body and an attaching lug made of tough ductile material anchored to the shoe body, and aims to produce a shoe of thisgeneral character .in which the wrought-metal attaching lug' will be so securely anchored to the shoe body that it can not bedetached therefrom even. should theshoe body become cracked or fractured.

I The invention embodies certain novel features of construction which, together with many of. their attendant advantages, will be" best understood'by referring to the following description when consideredin connee tion with the accompanying drawingsillustrating those forms of my invention which at presentseem to be preferable.

On the drawingsFigure 1 is a plan viewof a shoe in which my lnvention is incorporated, the shoe body being shown in dotted lines. Fig.2 isa central longitudinal secverse sectional view" taken on the line .3 3 of'Fig. 1. Fig.4 is a, similar view of' a slightly modified form ofshoe. Fig. 5 is a similar view of another form Fig. '6 is a.

' transverse sectional view on the line 6-.6 of

Fig. 1. Fig. 7 is a .detail perspective view of one form of attaching lug; and Fig. 8 is a similar view of a modified form of lug.

Referring to the drawings, 10 indicates the body of' the brake shoe which is preferably made of cast-iron and may be of.

any approvedshape or configuration. Reinforcing members 11, which in the present instance are shown as relatively narrow plates or bars, are disposed at or adjacent to the back of the shoe body, said membersv being of any desired contourand having, if preferred, beveled edges '12 as shown in Fig.

- 1 to enable the body metal to flow up over.

the edges and firmly unite the members with i the body. Notohes or recesses 13 may "provided in the edges of the members to rein Fig. 8 inwhich the metal I Speciflcation ofLetters Patent. Pat t 0 t 13. 1914 Application filed April 26,1912. Serial No. 693,385. i

eeive the metal of the shoe body for the purpose of forming a more rigid locking engagement'between the body and the mern- 1- hers. The end lugs 14 and the guide lugs 15 are also formed by the body metal which reinforcing *members.

The attaching lug 16 consists of iii-metal strap or strip bent to the desired shape illusflows up around the sides and ends of, the

6'5 trated in the drawings. This lug," as" will be} evident'from Fig; 2, is of substantially: U- shaped form, the ends of the lug being e'n ma 0 "en at. the sides of the Shoe and'the freeenc s 17 of the strap being bent in oppositedirections to extend longitudinally of the shoe.- The upstanding portions 18 of the lug are provided with ali'ned openings '19 through which the attaching key is inserted tosecure the shoe to the brake head. These openings may be made of the required size and shape to receive the key withoutf running the cast-metal into or around the projecting portion of the lug, this formbe ing shown in Fig. 5.. The sidewalls of the openihgsinthis form are perpendicular to the body of'the shoe'and parallel-with each serted 'through' the openings 19 before the shoe. is cast and lie flatwise upon the projeeting ends 17 of the attaching lug by "which they are supported 'duringthe casting tional elevation thereof. Fig.3 is a trans-J ,other. The reinforcing members 11 are in bpeirationi The members are preferably" a le the body metal to flow between them and, in order that the projecting ends may be as wide as required, the members are 'cut spaced apart throughout theirlength to enaway at their central portion asindicated at 20 so that when they are positioned at the the tops. -This construction permits wider reinforcing members tohle employed than would be possible-"with the straight walled openings shown in Fig.5.- The cast-metal ofthe shoe body may be run into or. around the projecting portion of .thelulg-as. shown ,fi .S'thappenf the bottoms of the openings are wider than I sides of the lug and reduces the size of the openings 19 to the required M. C. B. dimensions. The lug shown in Fi is so constructed that the openings 19 s owntherein are of the proper size without running any metal up into-and around thelug.

In the shoe shown in Fig. 4 the body metal-is not only run inside of the luv but also extends beyond the sides thereof approximately to the sides of the shoe. This metal assists to a certain extent in strengthening the lug but its chief purpose is to reduce the size of the ke Way opening to the re uired dimensions. *fhe metal is preferab y run into-the lug and across the top as shown in Fig. 2'so that a keyway opening of the exact dimensions required is provided. I

In the lug shown in Fig. 7 the openings 19extend from the bent ends 17 to the top of the. lug and are cutinto the crown flush with the mner faces of the upstanding portions 18. It will be'understood that when this type of lugis embodied in a shoe the cast body metal will fill in the upper part of the openings;

In, the lug shown in Fig. 8 the openings 19 extend upwardly only to the helght of so the keyway aperture and the tops of the opening may form'the ,bearlng surface for K the attaching key, if preferred, without running any of the body metal up into the top of the lug.

t will be understood from the foregoing that the size and shape of the openings 19 may be varied considerably and that the vent-ion or sacrificing any of the material advantages thereof.

l. A brake shoe comprising an attaching lug formed from a metal strap bent into substantially U-shape with the extremities thereof projecting longitudinally of the shoe, said lug being provided with alined keyway apertures, a plurality of reinforcin members disposed 1n said apertures an resting upon said longitudinally projecting extremities of the lug, said members being narrower at the center than at the ends so that the outer edges thereof will lie substantially in alinement with the ends of said lug, and a body cast on said members.

2. A brake shoe comprising an attaching lug formed from a metal strap bent into substantially U-shape with the extremities thereof extendingoutwardly in opposite directions, said lug being provided with alined keyWay apertures, a plurality of reinforcing members projecting through said apertures and engaged with said outwardly projecting extremities, the ends of the lug being disposed substantially in alinement with the sides of the reinforcing members, and a body cast on said members.

'3. A brake shoe comprising an attaching lug formed from a metal strap bent into substantially U-shape with the extremities thereof extending outwardly in opposite directions, said lug. beingprovided with alined keyWay apertures, reinforcing means projecting through said apertures above saidoutwardly extending extremities, the

ends of the said lug being disposed substantially in alinement with said reinforcing means, and a body cast on sald'relnforclng means and the extremities of said lug.

' WILLIAM M. SIMPSON.

Witnesses: WM. 0. BELT, M. A. KIDDIE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of "iatents,

' Washington, D. 2." Y 

